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"3.110; A'. T, VULPIUS. Millstone-Dressing Machine.

No. 225,442. Patented Mar. 9,1830.

UNITED STATES PATENT OFFICE.

'EDLER H. C. A. T. VULPIUS, OF POTTSVILLE, PENNSYLVANIA,ASSIGNOR TO SAMUEL E. GRISGOM, OF SAME PLACE.

MlLLSTONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 225,442, dated March 9, 1880.

Application filed January 29, 1880.

To all whom it may concern:

Be it known that I, EDLER H. O. A. T. VULPIUs, a naturalized citizen of the United States of America, residing in Pottsville, Schuylkill county, Pennsylvania, have invented an Improvement in Millstone-Dressing Machines, of which the following is a specification.

The object of my invention is to adapt a millstonedressing machine to the dressing of tapered furrows, an object which I attain by combining the tool-slide carrying-plate of the machine with certain devices for automatically changing the angle of said plate as the latter is moved longitudinally with the car riage.

In the accompanying drawings, Figure 1 is a transverse section of a millstone-dressing machine with my improvement; Fig. 2, a side View of the same; Fig. 3, a perspective view of part of the machine; Figs. 4 and 5, sectional diagrams illustrating the operation of the machine; and Fig. 6, a diagram representing the furrow.

A represents the bed or fixed frame of the machine; B, the carriage, adapted to longitudinal guides therein, and D the usual plate, pivoted to the carriage, and having guides for the slide Fconnected to the tool-post, the plate D also carrying the feed screw and mechanism whereby the same is operated on the longitudinal reciprocation of the carriage B, so as to effect the lateral shifting of the cutting-tool.

From one end of the plate D projects a pin, a, to which is hung a rod, b, the latter being adapted to a groove in a bar, J, the opposite ends of which are secured to vertical standards d at one side of the bed A of the ma- -chine.

reference to Fig. 6, the angle is most abrupt at the narrow end, and gradually lessens toward the wide end, of the furrow, at which point the angle is least abrupt.

In order to dress such a furrow, I cause the plate D, carrying the tool-slide, to be rocked on its bearings as it is being moved longitudinally by and with the carriage B, so that the angle of said plate D will always be parallel with that of the bottom of the furrow. Such rocking of the plate D is effected by adjusting the bar J to a position inclined in respect to the line of movement of the carriage B, the degree of angle being determined by the degree of taper of the furrow to be dressed.

When straight furrows are to be dressed the bar J is adjusted to a position parallel with the line of movement of the carriage B.

By this means furrows of any character and of any degree of taper can be closely and accurately dressed, thereby overcoming an objection to Inillstone-dressing machines as at present constructed, which are adapted for dressing straight furrows only.

Various ways of hanging the plate D to the carriage may be adopted, and, if desired, guide-bars at both ends of the plate may be used.

The character of the guide-bar may also be varied. For instance, the bar may be slotted and adapted to a simple projection or pin on,

the plate D. The arrangement shown, however, is preferred, as it is simple, and permits a free movement of the plate D and of the carriage B.

I claim as my invention- 1. The combination of the carriage B and tool-slide carrying-plate D of a millstonedressing machine with devices for automatically changing the angle of said plate as the latter is moved longitudinally with the carriage, all substantially as set forth.

2. The combination of the carriage B, the tool slide carrying plate D, pivoted thereto, and the adjustable guide-bar J, as specified.

3. The combination of the carriage B, the plate D, having a pin, a, with pivoted rod b, and the grooved guide-bar J, as described.

. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDLER H. G. A. T. VULPIUS.

Witnesses:

O. LITTLE, WALTER Gnisoolvr. 

